Can't get installed under Presta 1.6.1 at all

[hed102]

This module can't get installed under Presta 1.6.1.6 in the backend at all (mail-hook is installed).
If I rename the folder to 'postfinancecheckout' and install it via FTP, the whole site breaks down.

Error:
[PrestaShop] Fatal error in module file :../modules/postfinancecheckout/inc/Helper.php:
syntax error, unexpected 'const' (T_CONST), expecting variable (T_VARIABLE)

That bug might not appear under HPH > 7.1, so are you sure this module is tested and built for Presta 1.6.1.x and PHP < 7.1 ?

[theodorspringwallee]

Dear hed102

We will check this internally and will come back to you.

Best regards